What’s Vulnerable › Vulnerabilities

CVE-2026-46543: nimiq-blockchain: Genesis batch set request

• Severity: medium (CVSS 5.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-06-10 · updated 2026-07-23
• Weakness: CWE-617

Description

Nimiq is a Rust implementation of the Nimiq Proof-of-Stake protocol based on the Albatross consensus algorithm. Prior to version 1.5.0, a remote peer can crash any full node by sending a RequestBatchSet message containing the genesis block's hash. The handler calls get_epoch_chunks which iterates backwards through macro blocks using Policy::macro_block_before. When it reaches the genesis block number, macro_block_before panics with "No macro blocks before genesis block". This issue has been patched in version 1.5.0.

Affected products

• nimiq core-rs-albatross: before 1.5.0

References

• https://github.com/nimiq/core-rs-albatross/pull/3745
• https://github.com/nimiq/core-rs-albatross/releases/tag/v1.5.0
• https://github.com/nimiq/core-rs-albatross/security/advisories/GHSA-vghx-352f-93jm

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